Problem: A potassium bromide solution is 7.55% potassium bromide by mass and its density is 1.03 g/mL. What mass of potassium bromide is contained in 35.8 mL of the solution?

FREE Expert Solution

We’re being asked to calculate the mass of potassium bromide is contained in 35.8 mL of a potassium bromide solution that is 7.55% potassium bromide by mass and its density is 1.03 g/mL


And to do that we're going to use the mass percent formula shown below:

mass percent=mass componenttotal mass×100


Since we are dealing with a solution, we can rewrite the equation as:

% mass=mass solutemass solution×100


We don’t have the mass of the solution but we can calculate it using the volume and density of the solution.

volume solution (density) → mass solution

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Problem Details

A potassium bromide solution is 7.55% potassium bromide by mass and its density is 1.03 g/mL. What mass of potassium bromide is contained in 35.8 mL of the solution?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent concept. You can view video lessons to learn Mass Percent. Or if you need more Mass Percent practice, you can also practice Mass Percent practice problems.

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Based on our data, we think this problem is relevant for Professor Thyagarajan's class at JHU.